-f - Clears
the routing tables of all gateway entries. If this is used
in conjunction with one of the commands, the tables are
cleared prior to running the command.

-p - When
used with the ADD command, makes a route persistent across
boots of the system. By default, routes are not preserved
when the system is restarted. Ignored for all other
commands, which always affect the appropriate persistent
routes.

Commands:

PRINT -
Prints a route.

ADD - Adds
a route.

DELETE -
Deletes a route.

CHANGE -
Modifies an existing route.

destination - Specifies the host.

MASK
- Specifies that the next parameter is the 'netmask' value.

netmask -
Specifies a subnet mask value for this route entry. If not
specified, it defaults to 255.255.255.255.

gateway -
Specifies gateway.

interface
- Specifices the interface number for the specified route.

METRIC -
Specifies the metric, ie. cost for the destination.

All symbolic names used for destination are looked up in the
network database file NETWORKS. The symbolic names for
gateway are looked up in the host name database file HOSTS.

If the command is PRINT or DELETE, destination or gateway
can be a wildcard (wildcard is specified as a star '*'), or
the gateway argument may be omitted.

If Dest contains a * or ?, it is treated as a shell pattern,
and only matching destination routes are printed. The '*'
matches any string, and '?' matches any one char. Examples:
157.*.1, 157.*, 127.*, *224*.